使用没有 onclick 属性的按钮触发 javascript

Question

编辑：扩展 CJMarkham 的答案，我能够通过在他的答案中添加几行 javascript 来实现我所需要的。

这是最终的解决方案：

const buttons = document.querySelectorAll('button')

buttons.forEach((button) => {
  button.addEventListener('click', (e) => {
    const hex = e.currentTarget.value
    const p = document.getElementById("stuff");
    p.style.color = hex;
  })
})

button {height: 10px; cursor: pointer;}

<div class="container">
<p id="stuff">This text should change color to correspond with the pushed button</p>
</div>
<div class="color-field-widget-box-form" id="color-field-field-link-color">
<button class="color_field_widget_box__square active" value="#5e0dac" color="#5e0dac" title="#5e0dac" style="background-color: rgb(94, 13, 172);"></button>
<button class="color_field_widget_box__square" value="#fc0b22" color="#fc0b22" title="#fc0b22" style="background-color: rgb(252, 11, 34);"></button>
<button class="color_field_widget_box__square" value="#1abe00" color="#1abe00" title="#1abe00" style="background-color: rgb(26, 190, 0);"></button>
<button class="color_field_widget_box__square" value="#283ae5" color="#283ae5" title="#283ae5" style="background-color: rgb(40, 58, 229);"></button>
<button class="color_field_widget_box__square" value="#000000" color="#000000" title="#000000" style="background-color: rgb(0, 0, 0);"></button>
</div>

原文：我有一个带有五个<button>s 的表单元素。由于程序限制，我无法修改任何<button> 属性。所以我不能为每个按钮添加onclick、id 或class 属性。

单击按钮时，我需要将其十六进制值作为内联样式添加到页面上的另一个元素。

由于 JavaScript 知识有限，我知道的唯一方法是将 onclick 属性附加到每个 <button>。但是我无法修改属性，所以我需要另一种方法来定位按钮。

设置如下：

button {height: 10px; cursor: pointer;}

<div class="container">
<p>This text should change color to correspond with the pushed button</p>
</div>
<div class="color-field-widget-box-form" id="color-field-field-link-color">
<button class="color_field_widget_box__square active" value="#5e0dac" color="#5e0dac" title="#5e0dac" style="background-color: rgb(94, 13, 172);"></button>
<button class="color_field_widget_box__square" value="#fc0b22" color="#fc0b22" title="#fc0b22" style="background-color: rgb(252, 11, 34);"></button>
<button class="color_field_widget_box__square" value="#1abe00" color="#1abe00" title="#1abe00" style="background-color: rgb(26, 190, 0);"></button>
<button class="color_field_widget_box__square" value="#283ae5" color="#283ae5" title="#283ae5" style="background-color: rgb(40, 58, 229);"></button>
<button class="color_field_widget_box__square" value="#000000" color="#000000" title="#000000" style="background-color: rgb(0, 0, 0);"></button>
</div>

感谢您的宝贵时间！

Answer 1

您可以为每个按钮使用addEventListener，这将在单击按钮时触发回调函数。从那里，您可以获得value。

const container = document.querySelector('#color-field-field-link-color')
const buttons = container.querySelectorAll('button')


buttons.forEach((button) => {
  button.addEventListener('click', (e) => {
    const hex = e.currentTarget.value
    console.log(hex) // do something with hex
  })
})

button {height: 10px; cursor: pointer;}

<div class="container">
<p>This text should change color to correspond with the pushed button</p>
</div>
<div class="color-field-widget-box-form" id="color-field-field-link-color">
<button class="color_field_widget_box__square active" value="#5e0dac" color="#5e0dac" title="#5e0dac" style="background-color: rgb(94, 13, 172);"></button>
<button class="color_field_widget_box__square" value="#fc0b22" color="#fc0b22" title="#fc0b22" style="background-color: rgb(252, 11, 34);"></button>
<button class="color_field_widget_box__square" value="#1abe00" color="#1abe00" title="#1abe00" style="background-color: rgb(26, 190, 0);"></button>
<button class="color_field_widget_box__square" value="#283ae5" color="#283ae5" title="#283ae5" style="background-color: rgb(40, 58, 229);"></button>
<button class="color_field_widget_box__square" value="#000000" color="#000000" title="#000000" style="background-color: rgb(0, 0, 0);"></button>
</div>
<br>
<div>
  <button class="color_field_widget_box__square" value="#000000" color="#000000" title="#000000" style="background-color: rgb(0, 0, 0);"></button>
</div>